The y2 attribute is used to specify the second y-coordinate for drawing an SVG element that requires more than one coordinate. Elements that only need one coordinate use the y attribute instead.

As an XML dialect, SVG is namespaced. It is important to understand the concept of namespaces and how they are used if you plan to author SVG content. Namespaces are essential to user agents that support multiple XML dialects; browsers must be very strict. Taking the time to understand namespaces now will save you from future headaches.

The to attribute indicates the final value of the attribute that will be modified during the animation.

The writing-mode attribute specifies whether the initial inline-progression-direction for a <text> element shall be left-to-right, right-to-left, or top-to-bottom. The writing-mode attribute applies only to <text> elements; the attribute is ignored for <tspan>, <tref>, and <textPath> sub-elements. (Note that the inline-progression-direction can change within a <text> element due to the Unicode bidirectional algorithm and properties direction and unicode-bidi.)

The xlink:arcrole attribute specifies a contextual role for the element and corresponds to the RDF Primer notion of a property.

The u2 attribute specifies list of Unicode characters (refer to the description of the unicode attribute of the <glyph> element for a description of how to express individual Unicode characters) and/or ranges of Unicode characters, which identify a set of possible second glyph in a kerning pair.

The visibility attribute lets you control the visibility of graphical elements. With a value of hidden or collapse the current graphics element is invisible.

The xChannelSelector attribute indicates which color channel from in2 to use to displace the pixels in in along the x-axis.

SVG images can be used as an image format, in a number of contexts. Browsers support SVG images in:

SVG elements can be modified using attributes that specify details about exactly how the element should be handled or rendered.